forked from qt-creator/qt-creator
0c990ce2f3
Change-Id: I2090fb58442ae9382220e85515188656f74e7e21 Reviewed-by: Aurindam Jana <aurindam.jana@digia.com>
89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: http://www.qt-project.org/
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**
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**
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** GNU Lesser General Public License Usage
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**
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
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** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** Other Usage
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**
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**************************************************************************/
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#include "qmljsinterpreter.h"
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namespace QmlJSTools {
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namespace Internal {
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bool QmlJSInterpreter::canEvaluate()
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{
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int yyaction = 0;
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int yytoken = -1;
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int yytos = -1;
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setCode(m_code, 1);
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m_tokens.append(T_FEED_JS_PROGRAM);
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do {
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if (++yytos == m_stateStack.size())
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m_stateStack.resize(m_stateStack.size() * 2);
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m_stateStack[yytos] = yyaction;
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again:
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if (yytoken == -1 && action_index[yyaction] != -TERMINAL_COUNT) {
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if (m_tokens.isEmpty())
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yytoken = lex();
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else
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yytoken = m_tokens.takeFirst();
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}
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yyaction = t_action(yyaction, yytoken);
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if (yyaction > 0) {
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if (yyaction == ACCEPT_STATE) {
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--yytos;
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return true;
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}
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yytoken = -1;
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} else if (yyaction < 0) {
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const int ruleno = -yyaction - 1;
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yytos -= rhs[ruleno];
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yyaction = nt_action(m_stateStack[yytos], lhs[ruleno] - TERMINAL_COUNT);
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}
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} while (yyaction);
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const int errorState = m_stateStack[yytos];
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if (t_action(errorState, T_AUTOMATIC_SEMICOLON) && canInsertAutomaticSemicolon(yytoken)) {
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yyaction = errorState;
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m_tokens.prepend(yytoken);
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yytoken = T_SEMICOLON;
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goto again;
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}
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if (yytoken != EOF_SYMBOL)
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return true;
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return false;
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}
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} // namespace Internal
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} // namespace QmlJSTools
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